From your references:

However, our understanding of how dietary fibers regulate molecular events at the gene/protein level and alter cellular cholesterol metabolism is limited.

The extent of cholesterol lowering in response to fiber consumption is variable, depending on a number of factors including the nature of the background diet, type of dietary fiber, length of adaptation period, and amount of fiber consumed. Furthermore, much of this variability in the plasma lipid-changes reported in response to dietary fiber consumption is thought to have a genetic basis.

Certainly it isn't gonna hurt anything, so if you are not using any other cholesterol control medication, I would give it a shot - do a baseline blood and then some time period after another blood for comparison. +2